Rev built MS3 basic afr problems
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Rev built MS3 basic afr problems
Just got a rev ms3 basic and having problems getting an afr reading in TS. While idling, it stays at 7.3 and doesn't change. My WB gauge fluctuates slightly. (PLX devices WB) When I shut it off, it goes to 10 (offline). I have the WB wired through the db37 using the power/ground and the yellow wire for analog output.
Also have the immobilizer light flashing while running.
Also have the immobilizer light flashing while running.
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Zaphod.....I thought I found the problem when I looked at the calibration table and saw that it was blank. Didn't know at the time that TS doesn't remember the setting.
Rev....I'll check that later today. Your MS3 is awesome by the way. Started on first try and I have never seen afr's hold that steady at idle.
Rev....I'll check that later today. Your MS3 is awesome by the way. Started on first try and I have never seen afr's hold that steady at idle.
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With the EGO1 port set to CAN EGO (originally set to), the afr is 7.3 and idle oscillates a little before settling down. Changing it to normal EGO changes the afr to 10 and idle goes to **** quick with no change to afr display other than 10. Would it be better if I manually put in the calibration from the plx manual since it is "the first one ever built?"
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Changed calibration to custom linear and put the supplied numbers and it idles between 2-3k with no change in display. Anything else to check?
The numbers matched the default plx numbers from the drop down.....0v = 10afr and 5v = 20afr
The numbers matched the default plx numbers from the drop down.....0v = 10afr and 5v = 20afr
Last edited by stratosteve; 07-02-2014 at 04:33 PM. Reason: coo coo for cocoa puffs
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You mean I have to read and follow the large banner that goes across the screen when changing certain parameters? Sheesh
Normal for WB gauge to read different than TS? I read about voltage differences being caused by different grounds but using the supplied ground on the db37 would prevent that?
Normal for WB gauge to read different than TS? I read about voltage differences being caused by different grounds but using the supplied ground on the db37 would prevent that?
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You mean I have to read and follow the large banner that goes across the screen when changing certain parameters? Sheesh
Normal for WB gauge to read different than TS? I read about voltage differences being caused by different grounds but using the supplied ground on the db37 would prevent that?
Normal for WB gauge to read different than TS? I read about voltage differences being caused by different grounds but using the supplied ground on the db37 would prevent that?
Does your wide band have a programing cable, logging cable, or something similar that has a digital out?
Keith
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The PLX does have a digital output but I haven't figured out the protocol yet. I've bought an SM-AFR Gen3 just for that but I have other side projects to deal with.
Steve, does the gauge in TS follow the PLX gauge at all? Ie even if they have a large offset?
Steve, does the gauge in TS follow the PLX gauge at all? Ie even if they have a large offset?
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My plx is analog only.
Rev, TS appears to follow the plx gauge but I haven't nailed down the exact voltage difference. Seems to be ~.6v. We had a power outage last night and I didn't get much play time.
Rev, TS appears to follow the plx gauge but I haven't nailed down the exact voltage difference. Seems to be ~.6v. We had a power outage last night and I didn't get much play time.
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Correction on previous post. It is .6 afr not volts.
Is the normal procedure to alter the afr table by the offset to achieve the correct afr? I am currently running .6 afr higher just about everywhere. So 14.1 to 14.2 at cruise on my WB gauge and 14.7 on TS.
Is the normal procedure to alter the afr table by the offset to achieve the correct afr? I am currently running .6 afr higher just about everywhere. So 14.1 to 14.2 at cruise on my WB gauge and 14.7 on TS.
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Keith
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I think I have the afr under control now. Still need to work on the afr table a bit. I think it's a bit too rich under part throttle.
They only issues I have remaining are high idle on start up and it won't start unless I have the throttle opened a bit.
Car runs better than it ever has. Pulls hard and smooth. I just need to get the couple things done above. I should have done this sooner.
They only issues I have remaining are high idle on start up and it won't start unless I have the throttle opened a bit.
Car runs better than it ever has. Pulls hard and smooth. I just need to get the couple things done above. I should have done this sooner.
#19
If you want it to remain correctly linear you need to lower the upper and lower points by the same amount. Then the easiest way to check is to run the engine for a while, then shut it off and go back to accessory on with the key. Without the engine running it will read a very steady A/F ratio and you can compare the gauge with the TS A/F reading much easier than with the engine running.
Keith
Keith
Make all of your idle cells have the same ignition advance (you should probably already have this)
Richen VE in idle cells until you're running at about 11.0 AFR
Tune the custom calibration table until TS and the gauge agree in rich areas. Write this down.
Lean out VE in idle cells until you're running about 16.0 AFR (you'll have a hard time idling any leaner)
Tune the custom calibration table until TS and gauge agree in lean areas. Write this down.
Put both back into custom calibration, and you should be good to go.
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Idle and start issues resolved. Reduced the idle pwm into the 30's (in case a search results in this thread)
Next step, I am going to continue with veal at a less aggressive cell change to fine tune. Then moving on to the spark table.
Next step, I am going to continue with veal at a less aggressive cell change to fine tune. Then moving on to the spark table.
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